Oxodiperoxomolybdenum complex immobilized onto ionic liquid modified SBA-15 as an effective catalysis for sulfide oxidation to sulfoxides using hydrogen peroxide

Scaled‐up, selective and green synthesis of sulfoxides under mild conditions using (CeIII‐MoVI)Ox/aniline hybrid rods as an efficient catalyst

“…[15][16][17] Therefore, a large number of methods, procedures and oxidizing agents have been proposed for this type of transformation. [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] Despite the fact that amines such as aniline, pyridine and … are not an appropriate catalyst for the oxidation reactions, they can effectively modify the catalytic activity of the molybdates and molybdenum oxides due to the electronic interactions between these amines and the active sites in the hybrid structures. However, majority of these traditional protocols rely on the use of hazardous terminal oxidants with low content of effective oxygen, and high cost which can generate hazardous by-products.…”

Efficient and selective oxidation of sulfides in batch and continuous flow using styrene-based polymer immobilised ionic liquid phase supported peroxotungstates

“…28 Ionic liquids are an intriguing class of solvent that has been widely utilized for immobilisation of catalysts under homogeneous, liquid-liquid biphasic and liquid-solid (SILP) biphasic conditions, in some cases with remarkable success. 29 Recent endeavours in this area include highly selective sulfoxidations catalysed by a SILP system based on imidazolium modified SBA-15 and [MoO(O2)2(H2O)n], 30 a magnetically recoverable sulfoxidation catalyst based on magnetic nanoparticles entrapped in a tungstate-functionalised polyionic liquid, 31 an eco-friendly protocol for the oxidation of sulphides to sulfones catalysed by V2O5 in [C12mim][HSO4], 32 efficient and selective sulfoxidation catalysed by peroxotungstates immobilised on multilayer ionic liquid brushes-modified silica 33 Other recent developments include selective oxidation of sulfides with H2O2 catalysed by heterogeneous ionic liquidbased polyoxometalates, 34 selective oxidation of sulphides with a sulfoacid-hexafluorotitanate(IV) bifunctional ionic liquid, 35 ionic liquid-mediated oxidation of sulphides to sulfoxides, 36 efficient eco-friendly selective oxidation of sulphides to sulfoxides with molecular oxygen catalysed by Mn(OAc) 2 in [C12mim][NO3], 37 rapid oxidation of sulfides by themoregulated polyoxometalate based ionic liquids, 20b,38 selective and efficient desulfurization by amphiphilic polyoxometalate-based ionic liquid supported silica, 39 and heterogeneous selective sulfoxidation with polymeric ionic liquid nanogel-immobilised tungstate anions. 40 We have recently applied the concept of SILP-based technology to develop peroxotungstate-based Polymer Immobilised Ionic Liquid Phase (PIILP) oxidation catalysts in order to combine the favourable and tuneable properties of ionic liquids with the advantages of a solid porous support.…”

Perspective: Chemical reactions in ionic liquids monitored through the gas (vacuum)/liquid interface

“…57 In SILP, 54,[123][124][125] transition metal (TM) complexes are commonly employed as catalytically active species, with a thin IL film serving as solvent for both reactants and metal complex. An interesting situation arises when the ILs provide ligands themselves, with much higher concentrations than achieved in traditional molecular solvents.…”